湖北省保康县黄连山磷矿矿床地质特征及成因分析

Geological features and genetic analysis of the Huanglianshan Phosphate Mine deposit in Baokang County,Hubei Province

湖北省保康县黄连山磷矿位于扬子准地台中段的北部、上扬子台坪鄂中褶断区西北的黄陵断穹北西缘,为宜昌磷矿田的一个较为典型的矿床,区内出露地层主要为早古生代的沉积建造,构造要素简单。本文通过黄连山矿区成矿地质背景分析,在研究矿体地质特征和矿石以及围岩特征的基础上,认为黄连山磷矿为大型磷矿,主要发育于白云岩—磷块岩建造和页岩—磷块岩建造,沉积建造特征明显,并且伴生一些含钾页岩,工业矿层产于含磷建造旋回的上部,矿床成因类型为生物化学沉积磷块岩矿床。

The Huanglianshan Phosphate Mine in Baokang County,Hubei Province,is a representative deposit of the Yichang phosphate field,situated in the northern part of the middle section of the Yangtze paraplatform and on the northwestern margin of the Huangling fault dome in the northwest region of Ezhong fold fault area of Upper Yangtze.The exposed deposits in this area primarily consist of early Paleozoic sedimentary formations with simple structural elements.Based on the geological background analysis in the deposit,and the study of the specific geological features of the orebody,ore,and surrounding rock,it can be concluded that Huanglianshan Phosphate rock represents a significant deposit mainly developed within dolomite-phosphorite formation and shale-phosphorite formation.These deposits exhibit distinct sedimentary formation traits and are associated with potassium-bearing shale formations.Industrial deposits occur predominantly in the upper part of phosphorous formation cycles,indicating their genetic type as biochemical sedimentary phosphorous block deposits.